to back up what the Chief is saying, when I use Mozilla, I have no problems staying logged on. But when i use Internet Explorer, I begin to have difficulties.
In Internet Explorer, do Tools > Internet Options. Select the Privacy tab. If you are set to "medium" you may have difficulty with cookies getting wiped out when you refresh. So, on that dialog, press the Sites button. Add
www.nationalsforum.net and press the Allow button.
Since I did this, all is good on IE.